This article is certainly right telling us that the current aviation navigation system is out of date, but they are wrong by telling us that it is a WWII system. Of course radar was developed during WWII but the present navigation system was developed and put into use during the mid to late 60s. It took at least ten years to fully implement. It was created because of several midair collisions, one of which still holds the record for number of lives lost in a single aviation accident.

The cost of implementing the old system was enormous but necessary, making our present aviation industry possible. We now need to make that investment again in a GPS navigation system. This would make it possible to reduce separation with out degrading safety.

Just as back in the early sixties a dual system of point to point and radar navigation was used, a dual navigation system would have to be used for nearly a decade during the switch from radar to GPS. It would take that long to implement new equipment and training.